VBO Problems

Hello from germany

I have stored some objects as VBOs an everything works fine.
If i draw an additional text - created with wglUseOutlineFonts and stored as display lists
the VBO color - which is not transparent alpah=255 becomes transparent and the
normals look scrambled??
Hoe is it possible to modify the content of a VBO without accessing its memory??

Assume a solid cube color = 255, 255, 255, 255 -> white no transparency,
in the center of the cube is my text.
The first frame shows only the cube -> correct
the second frame shows the cube transparent with the text visible at its center